You can use any heads off of a Ford Windsor V8 that you want as well as Clevelands. The only cylinder head from a stock Windsor that will really net you any differences would be the 351 W, they have slightly bigger ports. The 5.0 heads and the other Windsor heads are pretty much just as bad as each other and you will loose compression by swaping to them. What I would reccomend, you might not want to swap the engine, but Id recomend taking the 5.0 engine, putting your 289 heads on it for a nice compression ratio, finding a camshaft from a Mustang 5.0 (you can probably get one for like 40 bucks) and tossing an intake on top like the Weiand Action Plus or Edelbrock RPM with a Holley 600 vacuum secondary carb, and with a set of 3.55 gears it will have very good throttle response and you'd probably be happy with it.
The downfall of pretty much every Ford V8 other than the 428 CJ (and those arent grat), the 427s, and Boss engines is cylinder heads. You can use Cleveland heads on your engine but youd have to tap one hole and fill another for differencs in water passenges (not a big deal though) and buy a special (read expensive) intake. 4V Cleveland heads would be too much for what I think youre looking for youd need to rev to about 9000 rpms to make use of them on a 289, but 2V heads might work well for you. Theyd be a bit big, but if you built the rest of the engine to take advantage of them itd work well.
And then theres always the aftermarket and Ford GT40 heads. Of the bunch, the GT40s are probably what Id recomend for you if you wont use the 5.0 engine.
By the way I just noticed you live in Berlin, how old are you? Im guessing in my age group. Im 17 and own a '67 Plymouth Satellite (actualyl I own two) and I have a buddy Joe (not on the board) who owns a '66 coupe. We warmed his engine up a bit and I dont know how much work you and your father do with engines but I assume some since you have a spare lying around, but Id always be happy to lend a helping hand. Im going to be going to the car show at Uconn in a few weeks, would you go there or is your
Stang off the road right now?
